Yii函数接口

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1.redict

return $this->redirect(['login']);

2.save

第一个参数是执行验证，第二个参数是指的那个字段（空的话 就保存全部）

     * @param bool $runValidation whether to perform validation (calling [[validate()]])
     * before saving the record. Defaults to `true`. If the validation fails, the record
     * will not be saved to the database and this method will return `false`.
     * @param array $attributeNames list of attribute names that need to be saved. Defaults to null,
     * meaning all attributes that are loaded from DB will be saved.
     * @return bool whether the saving succeeded (i.e. no validation errors occurred).
     */
    public function save($runValidation = true, $attributeNames = null)